Allow HotSpot to build on Linux 3.0+

[Dr Andrew John Hughes]

Linux 3.0 was released last week:

https://lwn.net/Articles/452531/

This webrev:

http://cr.openjdk.java.net/~andrew/pr748/

fixes the check in the HotSpot build to allow Linux 3.0 and on
through the version check.

This is against hotspot-comp/OpenJDK8 but our testing in IcedTea6
shows that the same patch applies all the way back to hs14 just
fine.

Ok to push?

You might also want to consider getting this into OpenJDK7 if
it's going to remain buildable... :-)
-- 
Andrew :)

Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)

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